Put ds down for his nap. Heard a thump. Went up to investigate and found him sitting on his window cill saying 'Mummy, I'm stuck'. Thankfully on the inside of the window...
His room is on the second floor, with a 10 feet drop below, onto our conservatory roof. Had his windows replaced only a few weeks ago as the old ones were so dangerous I insisted on changing them before he came out of his cot (he's 2 3/4). The old ones swivelled open from the bottom and had no locks, so he could easily have fallen from the cill. New ones were locked and tilt inwards.
Am just so relieved I changed them.